[erlang-questions] install_release/1 always returns enoent error

Kaiduan Xie kaiduanx@REDACTED
Fri Jan 9 22:39:52 CET 2009

I think you have to do install_release() from the erlang shell which starts
release A. Please also read System Principles documentation
http://www.erlang.org/doc/pdf/system_principles.pdf  on how to start the
first target system.


2009/1/9 Sergey S <ad.sergey@REDACTED>

> Hello.
> While reading OTP Design Principles (Release Handling part) I've found that
> function release_handler:install_release/1 doesn't work as expected. It
> returns a strange error, complaining about relup file:
> Eshell V5.6.5  (abort with ^G)
> 1> release_handler:install_release("B").
> {error,{enoent,"/usr/lib/erlang/releases/R12B/relup"}}
> And it's true - there is no such a file. Instead of $ROOT/releases/R12B my
> relup file resides in $ROOT/releases/B. I have no idea why release_handler
> searches for relup in R12B dir :/ It looks like a bug...
> I tried to copy my relup to R12B dir by hand, but It didn't help:
> 2> release_handler:install_release("B").
> {error,{bad_relup_file,"/usr/lib/erlang/releases/R12B/relup"}}
> Then, I've tried to find out the solution through Google. But what I've
> found (please, look at the comments for this article) was:
> http://spawnlink.com/articles/performing-real-time-upgrades-to-an-otp-system/
> There are people who run into the same problem. Unfortunatelly nobody gave
> solution to this problem.
> Here is the sources of my test app (1.4Kb):
> http://rapidshare.com/files/181485268/foo_app.tar.gz.html
> Thanks!
> --
> Sergey
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